From September 18 to September’s final trading day, long-Treasury ETF TLT fell from $81.25 to $77.78, a loss of about 4.3%. Over the same window, the ten-year minus two-year Treasury yield spread widened from 25 to 41 basis points. The curve grew steeper as the long-bond price fell.
The moving ends explain the distinction. Historical two-year yields rose from 4.76% to 4.88%, while the ten-year rose from 5.01% to 5.29%, an increase of 28 basis points. Both rose, with the long end rising more. This differs from steepening driven by a falling short end. Existing long-bond cash flows faced higher discount rates; more slope did not relieve price pressure. TLT does not hold an exact ten-year maturity, so those 28 basis points cannot be converted directly into a precise ETF loss.
The September 30 ten-year real yield was 2.93%. Growth expectations, inflation compensation, term risk, and bond supply and demand can all enter long-end pricing, with their contributions still unresolved here. Quarter-end locates the window on a calendar. Without flow or holdings evidence, it does not establish rebalancing as the cause of the decline.
Historical backfill prepared on October 4, 2026. The observation cutoff is the article date, with US market data through the 2026-09-30 New York close. Sources: TLT; FRED DGS10, DGS2, DFII10. The cumulative price change uses September 18 and 30 closes. Yield observations use those dates, with spreads calculated at published precision; intraday availability is not guaranteed. TLT is a long-Treasury ETF. No company results released after September 30’s close explain its regular session. Personal research and opinion for information only; not investment advice.